CODEWITHSUNDEEP
file-iompi
Pranav Raj
Pranav Raj

Reputation: 873

MPI.File usage: normal file writing vs MPI.File

If I have individual files for each process, does it make any difference if i write into those files using normal file pointer or writing using MPI.File?

Upvotes: 0

Views: 65

Answers (1)

Rob Latham
Rob Latham

Reputation: 5223

If you are using simple contiguous i/o operations? no, no difference.

If you are using MPI datatype (to describe memory) and/or MPI file views (to describe structure or some other non-contiguous file access), then it's possible the MPI implementation has some kind of noncontiguous i/o operation (e.g. data sieving, list i/o, datatype i/o)

Upvotes: 2

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